To all whom it may concern



om. 6 G0 ...l um uw A d nu .TL `.H nu t a DI Ej CASTLE.,

Quartz Crusher;

Fifa y' le NJPETERS. PMOTO-UTHOGRAFHER. WASHINGTON. D. C.

y f///// /r ////A/////////////// @einen tetes getraut @flirte .Leners Patent No; 80,912; ma August 11, 1868.

IMPROVEMENT IN QUARTZ-censuras.

'tte'dgrmde nimh tu itt tigen tetters @anni zmh'nmtbtg rati nf tige sante.'

To ALL WHOM 1T MAY cONeERN:

' Be it known that I, EDMUND CASTLE, of'Lncolnton, in the county of Lincoln, and State of North Carolina, have invented a. neur and useful Improvement in Stamp-Mills; and -Il'do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled'in the art to make and use the same, reference being had to the accompanying drawings,`forming part of this specification. p i

The nature of my invention relatesl to improvements `in quartz-crushing mills, whereby it is designed to improve the samedn construction and cheapen the expense; and-it eonsists l First, in providing recesses in the lower edges of the dies, and corresponding grooves in the bed-plate opening into the recesses in the same, in which the dies set, whereby a bent bar may be readily inserted to remove the dies from thei'rbells.

Second, in the manner ofjoining together the diierent parts of. the housingfframe, and in the arrangement v of a swinging gate andadjustable table,'to govern the delivery .of the pulverized re from the millras will. be

more fully described on reference to the accompanying drawings, wherein-d Figure il represents a' vertical cross-section of my improved mill, and ligureQa horizontal section, on the line :c :v ci'v lignvl. v I

A represents a heavy cast-iront mortar, as usually arranged in itsjgeneral features, in which are-arranged, in recesses in the bed of the-same, the dies Bf v a represents a groove or recess in the bed of themortars, commencing a short distance from one of the dies, B, sloping downward, and Opening intothe recessiprovided for the die, at the bottom of the same.

A corresponding inclined groove is alsoprovided in the lower edge of the die, wherebypthe bent end of a bar may be entered in such a manner as to raise the die out of its bed, which it is frequently necessary to do, for variousreasons.` Y i i 6 represents a groove, communicating with each of the recesses for the dies, which are all provided with a corresponding tapered recess, whereby, after the first `die B4 has been raised-out of its bed, the others may also be raised in like manner, or each one maybe raisedwythout disturbing the others, if necessary.

CC rcprescntthe east-iron ends of the housing-frame, andare east withlugsdol on their inner faces, whereby the vertical grooves are formed, to hold the sideplanking e of the said housing.

The said cast-iron ends/G of the husingframe are extended on each .sideoi` the mortar-bed, to provide on the one side the hopper H, forfi'eeding the ore into` the mill, and on the other the inclined tables D and E, for regulating the discharge of the same in a pulverizell state.

H represents a false bottom to thehopper H, covered with copper plate, for amalgamating purposes, and which may be taken out oi" its place while the mil'l is in operation, to, clean et? the particles ot' -gold accumulated upon it, by raising slightly the outer housing-plank'c. c, Y

The said extended ends'C C of theA housing-frame are cast withineliried lugs or projecting ribs, 0l d', fortn-` ing the inclined grooves for the tablesorfsldes D, E, F, and G, and the lower edges of the slides D and F'project intolongitudinal grooves in the outer. faces oi' the mortar-bed.

I represents a swinging gate, provided on its inner Sidc'with a'corrugited copper-amalgamating plate, i

against which the ore is splashed by the action ofV the stamps in the crushing operation, and whereon particles 'of o re accumulate, which mayV be readily removed by swingingthe gate outwardf The slide D, over which the pulverized orc passes away -with the water, is also provided with an amalga- `mating-plate, f, which may be elevated at its outer edge, above the slide D, bymeans of strips of wood inserted in the groove f1, in the upper face of the table or slide DJand the grooves f2, in the husing-plates C, whereby the height of water in the mortar may be'regulated, by which the degree of iineness of the pulverized ore may be governed, as the higher the water` is raised, the ner'the oreiwill be` crushed before it is carried off by the water. i y Y 'i When the ore and water pass 'over the tableD, they fall unito-the inclined table E, from which they may be discharged into any suitable receptacle or trough, to be conveyed away, as may be desired.

K represents lugs, secured to the posts of the framing, under whiclrthe cross-pieces L L are adjusted, to

y hold the covering-plates of thehonsing tightly down in the rebates l Z, in the vupper edges of the vertical' housing-planks.

l Z representpins-to hold the pieces L L in place. A y

By this *arrangement of the grooves formedinthe said` housing-plates, I am enabled to `oin the sides of the housing-frame, the inclined tables, and also the top covering in avery secure manner, by water-tight joints, without bolts or other fastenings, all the parts being so arranged that any one or more `of them may readily be taken out without disturbing the others.

I am'also enabled to vprovide a. very large amount of amalgamating-surfaoe, and to entirely dispense with theA use of screens for regulating the neness of the ore, by reasonof the adjustable arrangement o'f the plate f, to govern the height of the water. l

I am also enabled'to remove the amalgamating-plates, to remove the afccumulation thereon, while the machine is in operation, without diilculty.- v

Iclaim as new, and desire to secure by Letters Patent- '.L The end housing-plates C C of a quartz-crushing mill, provided with the grooves for holding the side portions and the inclined tables D E, and the bottom of the hopper, substantially as and for the purpose described. l

2. The combmation, with a. quartz-mill, of the swinging .gate I, provided with a. metal' plate, the inclined table D, and the adjustable plate f, substantially as and for the purposedescribed.

EDMUND CASTLE. Witnesses:

IBVING J. lPOLLOK, J. STEVENS;A 

